Prickles are smaller than thorns: they are sharp outgrowths of the plant's outer layers, the skin-like epidermis, and the sub-epidermal layer just beneath it.
皮刺比刺要小了许多：它们是这些植物外层的附属物，看上去像皮肤的表皮，其下还有亚表皮层。
The results show that sub-wavelength wire-grid polarizers perform best when they have sharp corners, vertical sidewalls and smooth surfaces.
理论分析表明，顶角为直角、侧壁垂直和表面光滑的理想矩形光栅结构的偏振性能最好。
As the networks are expanding and sharp increasing in the number of sub-network case, the current global optimal routing algorithms face serious challenges.
随着网络规模不断扩大，子网数量急剧增多，目前全局最优的传统路由算法将面临严重挑战。
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